https://scholars.lib.ntu.edu.tw/handle/123456789/598565
標題: | In situ engineering of highly conductive TiO2/carbon heterostructure fibers for enhanced electrocatalytic degradation of water pollutants | 作者: | Wu J.-C Chuang Y.-H Liou S.Y.H Li Q CHIA-HUNG HOU YA-HSUAN LIOU |
關鍵字: | Carbonized electrospun fibers;Electrocatalysis;Electrospinning;Heterostructure;Nanocomposite;Carbonization;Electrodes;Energy efficiency;Free radical reactions;Oxide minerals;TiO2 nanoparticles;Titanium dioxide;Water pollution;Water treatment;Carbonization temperatures;Carbonized electrospun fiber;Crystal violet;Electrocatalytic activity;Electrocatalytic degradations;Electrode material;Electrospun fibers;Nanocomposite electrodes;Rational design;Water pollutants;Nanocomposites;catalysis;catalyst;concentration (composition);degradation;electrode;graphitization;in situ measurement;inorganic compound;nanocomposite;pollutant removal;temperature effect;water pollution | 公開日期: | 2022 | 卷: | 429 | 來源出版物: | Journal of Hazardous Materials | 摘要: | Rational design of nanocomposite electrode materials with high conductivity, activity, and mechanical strength is critical in electrocatalysis. Herein, freestanding, flexible heteronanocomposites were fabricated in situ by carbonizing electrospun fibers with TiO2 nanoparticles on the surface for electrocatalytic degradation of water pollutants. The carbonization temperature was observed as a dominant parameter affecting the characteristics of the electrodes. As the carbonization temperature increased to 1000 °C, the conductivity of the electrode was significantly enhanced due to the high degree of graphitization (ID/IG ratio 1.10) and the dominant rutile phase. Additionally, the formation of TiO2 protrusions and the C-Ti heterostructure were observed at 1000 °C, which contributed to increasing the electrocatalytic activity. When 1.5 V (vs. Ag/AgCl) was employed, electrocatalytic experiments using the electrode achieved 90% degradation of crystal violet and 10.9–87.5% for an array of micropollutants. The electrical energy-per-order (EEO) for the removal of crystal violet was 0.7 kWh/m3/order, indicative of low-energy requirement. The efficient electrocatalytic activity can be ascribed to the fast electron transfer and the strong ability to generate hydroxyl radicals. Our findings expand efforts for the design of highly conductive heteronanocomposites in a facile in situ approach, providing a promising perspective for the energy-efficient electrocatalytic degradation of water pollutants. ? 2022 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123764760&doi=10.1016%2fj.jhazmat.2022.128328&partnerID=40&md5=bff54c97f141190569102c96293ad5c0 https://scholars.lib.ntu.edu.tw/handle/123456789/598565 |
ISSN: | 03043894 | DOI: | 10.1016/j.jhazmat.2022.128328 |
顯示於: | 環境工程學研究所 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。